Two scientists and a reporter are lowered into the ocean in a bathosphere to study the effects of the Cromwell Current. An underwater volcano erupts and causes the cable to snap - huddling the bathosphere into the ocean depths. The three are soon rescued by a couple crew members of a submarine, named Alpha, and are taken to a secret underwater base... LATITUDE ZERO. It is there the three learn that people who were once thought to be dead are living there... even people who had supposedly been dead over 200 years ago. And this is just only the beginning of this feature film.